Drop column fails with ORA-39726,Exchange partition fails with ORA-14278 if partition table has unused column
(Doc ID 2054896.1)
Last updated on MARCH 10, 2020
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
1,with compressed subpartion and drop column fails:
SQL>alter table <table_name> drop column <column_name>;
ORA-39726: unsupported add/drop column operation on compressed tables
2,Excahnge partition fails with:
SQL>ALTER TABLE subpart_table EXCHANGE SUBPARTITION <partition> WITH TABLE
<table_name> INCLUDING INDEXES WITH VALIDATION;
ORA-14278: column type or size mismatch in EXCHANGE SUBPARTITION
3,Logical delete can be done:
SQL>alter table <table_name> set unused column <column_name>;
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